4 Pcs Bike Light USB Rechargeable Bike Tail Light Bicycle Headlight Tail Light Set Ultra Bright Bicycle LED Safety Light Waterproof Cycling Taillight 7 Modes for Road Mountain Night Riding

These are great flasher for my e-trike. I get thumbs up from cars all the time.

Super bright and function as advertised. Don’t look directly into it lol. Wish the Blue light had a flashing function like the red does. In the image, the two red lights can go solid or flash at different tempos, but the two blue in the image only go solid blue or solid red. They also flash, but it’s alternating like police lights.

Easy to charge, easy to strap onto bicycle seat post, easy for motorists to see. Only flaw: the USB connection is covered by a little rubber flap. That flap wears out and/or breaks off soon. I don't yet know how well the devices will hold up during a rain shower. Battery life: If you're doing all-day bike touring, then you might want to run 2 lights in the a.m. and the other 2 lights in the p.m. On the whole, the 4 lights provide a lot of illumination for the $.

I was tempted to give these only 4 stars because 2 of them don't plug in very well. The usb port is a little crooked. Decided to give 5 stars because they work perfectly otherwise and they are pretty inexpensive. So "for the money" they are 5 stars. I'd still buy them again if I wanted more.

bright visible even during the day. it has multiple modes (fast, slow blink, steady, etc...). it can swivel which is helpful when your bike frame is at an odd angle

I like these lights but the plastic mounts on the back I've already had three of them break on me so I'm looking for alternative ways to mount them they're nice they're definitely bright and they I ride about an hour and a half a day and I can use them for 3 or 4 days for recharge there are they're pretty bright and I like them I just got to figure out a better way to mount them because the rubbers I'm a snapped on a couple of them and a plastic mounts are broke on the other two so I'm a little bummed about that

This is my second set they seem to last a little over a year they finally wear out but they're pretty cheap but very effective the red and blue flashers are a lot of fun when people see me they think I'm the police and I just say greetings Earthling it is I the ET police and they get a good laugh so it helps to make friends everywhere I go

These lights are great from a brightness and visibility point of view. I like the alternating red and blue flashing lights, definitely grabs more attention like a cop/EMS vehicle.However the bottom part that clips into the flexible strap to tie it to your bike (or EUC in my case) was poorly made. It snapped off after just one ride and was completely unusable. I had to put it back together with gorilla glue